Time mechanism for furnaces.



J. F. WILLIAMS. TIME MECHANlSM FOR FURNACES. APPLlCATiON FILED FEB.25. I914.

2 SHEETS-SHEET I.

7HE NORRIS PETERS CO. PHOTO-L!THO.. WASHINGTON Patented J1me 1, 1915.

J. F. WILLIAMS. TIME MECHANISM FOR FURNACES.

APPLICATION FILED FEB. 25, 1914.

Patented June 1, 1915.

THE NORRIS PETERS Ca, FHOTGLITHO.. WASHINUION. D. c.

Specification of Letters Patent.

TIME MECHANISM FOR summons.

Patented June 1, 1915.

Application filed February 25, 1914. Serial No. 820,990.

To all whom it may concern I Be it known that I, JOHN F. WILLIAMS, a citizen of the United States, residing at Wilkes-Barre, in the county of Luzerne and State of Pennsylvania, have invented new and useful Improvements in Time Mechanism for Furnaces, of which the following is a specification.

The invention relates to time controlling mechanism, and more particularly to the class of time mechanism for furnaces, stoves or the like. 1

The primary object of the invention is the provision of time mechanism wherein the draft doors or damper or both in a furnace structure will be automatically operated at a determined period of time. to create or increase the draft therein for the proper combustion of the fuel, and thereby obviating the necessity of manual attention by the operator of the furnace or stove.

Another object of the invention is the provision of time mechanism wherein'the ordinary alarm clock can be used to effect the working of the mechanism for regulating the draft in a furnace or stove at a determined hour or fraction thereof, the mechanism being of novel form to positively operate the doors of the damper of a furnace or stove.

.A further object of the invention is the provision of time mechanism of this character wherein the attention to a furnace or stove at certain intervals is obviated for the regulation of its draft.

A still further objectof the invention is the provision of time mechanism which possesses simplicity of construction, durability, and also one which is reliable, accurate and eflicient in its operation, as well as inexpensive in installation and manufacture.

With these and other objects in view, the invention consists in theconstruction, com bination and arrangement of parts as will be hereinafter fully described, illustrated in the accompanying drawings, and pointed out in the'claim hereunto appended.

In the drawings: Figure 1 is a fragmentary front elevation of a furnace showing the time mechanism constructed and arranged in accordance with the invention for the simultaneous closing and opening of the doors of the fire box and ash pit respectively. Fig. 2 is a top plan view. Fig. 3 is a sectional view on the line 3-8 of Fig. 1. Fig. 4 is a sectional view on the line 44: of

Fig. 1. Fig. 5 is a fragmentary rear elevation of the time mechanism. Fig. 6 is a fragmentary perspective view of the time mechanism, showing it released, with the doors closed and open of the respective fire box and ash pit.

Similar reference characters indicate corresponding parts throughout the several views in the drawings.

Referring to the drawings in detail, A designates a portion of a furnace used for heating buildings, having at its front the usual fire boX door B and ash pit door C, which are hinged for swinging movement to open or closed position, while arranged at one side of this furnace is the time mechanism hereinafter fully described.

The time mechanism comprises in this instance a base 10, from which rises a vertical upright 11, preferably formed in two sections, the same being bolted or otherwise secured together to permit of the vertical adjustment of the said upright, and secured to the upper end thereof is a bracket 12, between which and the upright is arranged a rotatable drum 13, the shaft 1 1 of which is journaled in the bracket and upright, one end of the shaft being fitted with a hand crank 15, while its opposite end has fixed thereto a trip arm 16 which is controlled by means of an ordinary alarm clock 17 supported in a manner hereinafter fully described.

Secured to the upright 11 is a U-shaped frame 18, one limb of which forms a pintle 19 for a swinging latch bar or arm 20 carrying a ring 21 in which is detachably fitted the clock 17 having projecting from its rear face the alarm winding key 22 with which engages the trip arm 16 so that when the alarm mechanism is released at a predetermined hour or fraction thereof the key 22 will turn and thereby free the trip arm 16 for a purpose presently described. The latch bar or arm 20 is normally engaged with the bracket 13 to hold the clock 17 in the position shown in several figures of the drawings, but it will be apparent that on releasing the latch arm 20 the same can be swung outwardly on the pintle 19 to enable access to be had to the winding keys of the clock at the rear thereof without necessitating a person reaching rearwardly of the upright to wind the clock, and thereby obviating inconvenience in so doing. The other limb of the frame 18 is formed with a guide eye 23 c at its extreme end, and through which .is

threaded branch cables or ropes 24 and 25 respectively, the same being united to a single cable or rope 26 which is connected to the periphery of the drum 12 for the winding of the same thereon and the unwinding thereof therefrom. At the point of connection of the cables or ropes 25 with the cable or rope 26 is secured a Weight 27, while connected to the cable or rope 24 at its free end is a hook 28 which engages in a keeper 29 mounted on the door B, and likewise connected to the free end of the rope 26 is a hook 30 which engages in a keeper 31 mounted on the door C, the cable or rope 25 being trained over an outwardly curved guide arm 32 integral with or fixed to the frame 18 so that on the turning of the drum 12 the cables or ropes 24, 25 and 26 will become slack and the weight 27 connected thereto will exert a pull on the branches 24 and 25 to cause the closing of the door B and simultaneously therewith the opening of the doorO, the drum 12 being free for rotation on the release of the trip arm 16 from engagement with the clock key 22 when the alarm mechanism of the clock is released. The pull exerted upon the cables or ropes 24 and 25 will serve to lift the doors B and C for the latching or unlatching thereof when being opened or closed. If found desirable, wire cables may be substituted for the hemp cables or ropes. Also, if deemed expedient, the time mechanism may be supported from the ceiling or from the wall of the room in which the furnace is located. Furthermore, one of the cables or ropes 24 or 25 may be connected to the pipe damper of the furnace or stove for the opening thereof when the time mechanism is in action.

In the setting of the time mechanism the hand crank 14 is turned for rotating the drum 12 so that the single cable or rope 26 will be wound thereon, thus holding the branches, cables or ropes 25 and 26 taut so that the weight 27 is held inactive against the same to avoid the closing of the door B and the opening of the door G of the furnace. When the cable or rope 26 is wound on the drum 12 the trip arm 16 is engaged with the key 22 of the alarm mechanism of the clock, it being assumed of course that the said alarm mechanism has been set to re spond at a predetermined hour or fraction thereof so that on the release of the alarm mechanism the key 22 will rotate to free the arm 16, and thereby release the drum for the unwinding of the cable or loop 26 thereon, and in this manner the weight becomes active upon exerting a pull upon the branches, cables or ropes 24 and 25 to efiect partially opened, and the opening'of the door C, so thata draft will be created or increased in the furnace for the proper'burning of the fire at a determined period of time.

It is of course to be understood that changes, variationsand modifications may be made in the invention such as come properly within thescope of the appended claim without departing from the spirit'or sacrificing any of the advantages of the invention.

The limb of the frame 18 formedwith the eye 23 is preferably made sectional, and the parts thereof adjustably connected together in any suitable manner so that the said limb can be lengthened or shortened to enable the time mechanism to be positioned properly with respect to the doors arranged at diflerent heights of furnaces.

From the foregoing it is thought that the 7 construction and manner of operation of the device will be clearly understood,and therefore a more extended explanation has been omitted. e

What is claimed is:-

A time mechanism of the class described comprising a support formed in two sections a'djustably connected to each other, a yoke at the upper end of the support, a winding drum journaled in said yoke, frame fixed to one limb of the yoke, a guide member adjustably connected to one arm of the frame, a swinging holder pivoted to the other arm of the frame and adapted to receive a clock, a resilient catch on the said holderand engageable with the other limb of the yoke to lock the holder, a curvilinear arm adjustably connected to the arm of the frame carrying the guide membe'rfa cable detachably connectedto the'drum and adapti 7 ed tobe wound and unwound therefrom-and having branches trained'through theguide' a U shaped I nate opening and closing of the same, a

weight connected with said cable, and means operative by the alarm key of the said clock when in the holder for releasing the drum whereby the cable will' become detached therefrom for operation by the weight.

In testimony whereof I affix my signature in presence of two witnesses. JOHN F. 'WILLIAMS. Witnesses: i

E. EDMONSTON, Jr., FRANK O. PARKER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Iiatenta.

Washington, D. (3, 

